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The number of preppers in the U.S. has absolutely exploded in recent years. It has been estimated that there are now approximately 3 million preppers in the United States. There is a general consensus among preppers that our world is becoming increasingly unstable. Some are preparing for the collapse of the economy. Others are extremely concerned about the potential for crippling natural disasters and catastrophic earth changes. Terrorism, killer pandemics, EMP attacks, World War III, martial law, massive solar storms, asteroid strikes and societal chaos are all possible in an uncertain future.